My first supra n/a automatic
 

Should i keep my car how it is and just drop a turbo? can decide if i should switch the tranny to manual and to a twin turbo engine. Will my car still be fast even tho it is automatic once i drop a turbo on it?
http://i1131.photobucket.com/albums/...9/IMAG1003.jpg

No. The least expensive route if you want "fast" is to sell your n/a and get a TT. Honestly - this topic has been covered several thousand times - probably at least once for every unfortunate soul that has mistakenly purchased an n/a. Diff, brakes, tranny, shortblock, head, ignition, suspension, etc., etc., etc., all suck in the n/a when compared with what you get bone stock in the TT.

Here's a 100% complete kit to upgrade the n/a engine to a relatively small single turbo...but as you point out the transmission will then become your failure point. You'll just keep dumping good money after bad until you learn the hard way that you should have sold the n/a and got a TT:
http://www.boostlogic.com/catalog/p1...duct_info.html

Yeah the tt is a much better car to start a build on, I do like my auto though, but it is a built tranny so that might help me out,

good luck!